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Hair Conditioning

HYDROLYZED KERATIN

CAS 69430-36-0 Updated
82

Safety score · 0–100

Good

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

Keratin protein broken into small peptides that bind to damaged hair and skin. Long-standing CIR-reviewed conditioning agent with a clean safety record at cosmetic levels.

Skin benefits

  • Conditioning peptides bind to hair and skin
  • Improves hair tensile strength and reduces breakage
  • Forms a hydrating film on skin

Known concerns

  • Sourced from animal hair/feathers (not vegan)
  • Rare contact sensitization reports
  • No significant systemic concerns

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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ETHYL ESTER OF HYDROLYZED KERATIN
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ETHYL ESTER OF HYDROLYZED SILK
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.